Codeblocks macros

I want to print the line generated by the preprocessor:

cout << GITHASH << endl;

      

        
        
        
      

    

It works fine with app app from command line:

g++ -DGITHASH="\"dirty\"" app.cpp -o app.o

      

        
        
        
      

    

But if I put this macro in the compiler, define the parameter in the project build options, I get the following error:

Error: "dirty" was not defined in this scope

Does anyone know how to correctly define this macro in the codeblock settings?

I am using code blocks 16.01 on ubuntu 16.04.

Edit: Now I want to replace the "dirty" git description for my project.

GITHASH=\\"$(shell git describe --dirty --always --tags)\\"

      

        
        
        
      

    

Any idea?

Edit:

It works with:

GITHASH=\\"`git describe --dirty --always --tags`\\"